VRChat Logfile full of Error "XYZ could not use Station at" when in the world

[farfelu]

Describe the bug
Whenever I'm a public The Great Pug instance with many people in it the log file gets blasted with the message

2021.11.15 23:27:25 Error      -  [Behaviour] <SomeUser> could not use Station at :<SomeNumber>/

always with different users and numbers.
30 minutes into the world and the message appears 122492 times.

$ cat output_log_21-13-15.txt | grep "could not use Station at :" | wc -l
122492

I asked some people who join me regularly in the instance who also had hundredthousands of those errors in the log.

To Reproduce
Join a public "The great pug" instance with many other people and monitor the log file

Expected behavior
A less busy log file

partial OutputLog (usernames redacted)

...
2021.11.15 23:38:47 Error      -  [Behaviour] User01 could not use Station at :18/
2021.11.15 23:38:47 Error      -  [Behaviour] User02 could not use Station at :2D/
2021.11.15 23:38:47 Error      -  [Behaviour] User03 could not use Station at :30/
2021.11.15 23:38:47 Error      -  [Behaviour] User01 could not use Station at :18/
2021.11.15 23:38:47 Error      -  [Behaviour] User02 could not use Station at :2D/
2021.11.15 23:38:47 Error      -  [Behaviour] User03 could not use Station at :30/
2021.11.15 23:38:47 Error      -  [Behaviour] User01 could not use Station at :18/
2021.11.15 23:38:47 Error      -  [Behaviour] User02 could not use Station at :2D/
2021.11.15 23:38:47 Error      -  [Behaviour] User03 could not use Station at :30/
2021.11.15 23:38:47 Error      -  [Behaviour] User01 could not use Station at :18/
2021.11.15 23:38:47 Error      -  [Behaviour] User02 could not use Station at :2D/
2021.11.15 23:38:47 Error      -  [Behaviour] User03 could not use Station at :30/
2021.11.15 23:38:47 Error      -  [Behaviour] User01 could not use Station at :18/
...

it's about 56 lines per second.

Are you in VR or Desktop mode?
VR on SteamVR

Additional context
It doesn't cause any issues, but might be unintended.
I noticed because I have a log parser running sending me messages through my overlay and it has a visible log output. Whenever I'm in an instance it's just nothing but this error message, I haven't seen any other world do this.

[owlboy]

Hello,

Thank you so much for taking the time to report this!

I just pushed an update:

• Removed duplicate Udon Behaviors unexpectedly found on some stations.
• Stations with Udon sync modes set to "none" are now set to "manual"

I assume the duplicate Udon Behaviors were the cause of the issue. I'm not sure why some of the stations ended up with multiple scripts.

[owlboy]

I am not the only one running into this issue:

VRChat Feedback / Canny link:
https://feedback.vrchat.com/bug-reports/p/errorbehavior-xx-could-not-use-station-at-4f

This person thinks it is a client issue. They see it with SDK2 and SDK3.

Another person reporting the same issue, back in September:
https://feedback.vrchat.com/bug-reports/p/vrcstation-outputs-error-log-in-1132

[owlboy]

Based on discussing this with others, this is definitely a bug VRChat introduced. Others have reproduced it in their own testing.

Please help support this feedback item:

https://feedback.vrchat.com/bug-reports/p/vrcstation-outputs-error-log-in-1132

[owlboy]

Comments posted on the VRChat Feedback Item/Canny in the pervious comment indicate this is likely fixed.